Ruta Fox sold a condo at 179 E. 79th St. Unit #3C in the Upper East Side to Barbara K. Nicholas for $550,000 on Dec. 1, 2010.

Fox paid $585,000 for Unit #3C in May 2007. The 790-square-foot condo is part of the 37 units in the 179 E. 79th St. condo development, which was built in 1928.

Fox is an entrepreneur, a branding expert and the CEO and president of Divine Diamonds.com. She has been involved in the advertising, public relations, marketing, publishing, branding and copywriting industry and was a freelance writer for Vanity Fair, Self, Health and Marie Claire. She was also a senior copywriter for Saks Fifth Avenue.com, Bloomingdales, New York, and an associate creative director for G2.

According to BlockShopper.com, there have been 312 home sales in Upper East Side during the past 12 months, with a median sales price of $876,000.

Address: 179 East 79th Street, Unit: 3c
Buyer(s): Nicholas and Barbara K
Seller(s): Fox and Ruta
Sale date: Dec. 1, 2010